I NeeD HeLp PLease AM882 a good choise

[Jonathan]

Hello again, Jonathan I send a mail to CNC4YOU to ask if they can ship to Argentina, anyway I was looking for the NEMA23 you mentioned and found this model Power Motor! Wantai Nema23 Stepper Motor WT57STH115 4204A 428oz in 4.2A Medical Automation Imaging Printing-in Stepper Motor from Industry & Business on Aliexpress.com I think its correct but I want to be sure

The inductance is marginally worse than the CNC4YOU (and Zapp) motors, but you're unlikely to notice much difference assuming they do actually meet the specifications. I measured the inductance of some of the motors I got from CNC4YOU and it was within tolerance.

, and I also found this offer �Germany SHIP Free SHIP】4Axis Nema23 Wantai Stepper Motor 425oz in 4 2A CNC Mill | eBay,I dont know if DQ542MA drivers work for me

Definately don't buy those drivers. They're only rated for 50V, so they've used 36V power supplies which is far too low. As you increase the speed required from a stepper motor, the supply voltage must be increased to maintain a high torque output. It's therefore best to run the motors you've chosen (or the CNC4You / Zapp ones) at around 70V. You therefore need to pick drivers which are rated for 80V - e.g. DQ860MA, AM882 and no doubt others which are available from Aliexpress.

shoud go for MT880 for the x axis and combine it with other cheaper for the other axes? Really Its easy buy all together but as I sed before I dont now anithing about electronic.

Up to you, so long as they're rated for 80V.

[jpsicilia]

Hello Jonathan, is there any power supply do you recommended? Jazz told me to buy this [URL="http://www.zappautomation.co.uk/en/digital-stepper-drivers/318-2m2280n.html"] but I have the same problem( I can only buy on aliexpress and ebay) maybe you can recommend another power supply so I can find it, I dont now if I need one or more than one. Thanks,you have been of great help.

[JAZZCNC]

Hello Jonathan, is there any power supply do you recommended? Jazz told me to buy this [URL="http://www.zappautomation.co.uk/en/digital-stepper-drivers/318-2m2280n.html"] but I have the same problem( I can only buy on aliexpress and ebay) maybe you can recommend another power supply so I can find it, I dont now if I need one or more than one.

Juan, I would have only told you to buy that PSU if you didn't want to build your own. My first choice and advice I'd usually give first is to build your own has it's cheaper and can be tailored to suit your exact needs.
One of the problems with most Off the shelf PSU's is they all seem to fall short of the ideal requirements either on Volts or Amps so you end up buying 2 which makes it expensive and more room required in control box. So given your location then I would think it would be easier for you to locally source the parts to build one than trying to source ready built PSU to suit your needs.

[jpsicilia]

Thanks Jazz, I'll wait until buying the nema and drivers, and if you help me I think I can make the power supply. I have the tools, digital tester and welder to be able to do it. I´ll keep you posted. Thanks for everything!

[jpsicilia]

Hello guys I recieved all my stuffs from china,I want to build the psu suit for my needs. Can you give me an advice to buid it please.
I have Axis X=2 AM882,Axis Y=1 AM882,Axiz Z=1 DQ860MA,four Axiz=1 DQ860MA,Motors 4PCS Nema 23 stepper motor 425oz-in,3A,2ph,1.8°. Thanks for everything!

[JAZZCNC]

Hello guys I recieved all my stuffs from china,I want to build the psu suit for my needs. Can you give me an advice to buid it please.
I have Axis X=2 AM882,Axis Y=1 AM882,Axiz Z=1 DQ860MA,four Axiz=1 DQ860MA,Motors 4PCS Nema 23 stepper motor 425oz-in,3A,2ph,1.8°. Thanks for everything!

Contact me thru PM with your email address and I'll help you with PSU but won't do it over the forum as it can be miss understood by others and potentialy dangerous and damaging if done wrong or misunderstood.! . . . . . . Others may offer over the forum but I'm not prepared to do that.!

Also At the moment looks like you plan to use AM882 for X & Y with DQ860 for Z & A but you have bit of a mixed up setup there mixing digital drives with Analog drives and if Slaving A axis with another(X) to form twin motor axis then you would be much better using same drives on each.! The AM882 would be best for this because they have stall detect and fault signal.

Another thing is the motors.! Which motors are they and do you have a data sheet or model number.? Becasue you quote 425oz rather than Nm I suspect these are the high impedance motors often found cheap on ebay.? If so be aware you will get much lower performance from them for the same amount of Voltage compared to same power motors with lower impedance. This will affect the feeds you'll achieve and lower the amount of torque available higher up the speed curve.!

[Jonathan]

Another thing is the motors.! Which motors are they and do you have a data sheet or model number.? Becasue you quote 425oz rather than Nm I suspect these are the high impedance motors often found cheap on ebay.?

Yes they are high inductance - the lower phase current (3A) is the giveaway.